Deuteronômio 23:15 Halacá: Mishneh Torah, Reading the Shema, Mishneh Torah, Human Dispositions, Mishneh Torah, Kings and Wars & Shulchan Arukh, Orach Chayim

The Shema is not to be read in a bath house nor in a latrine, even if there is no ordure in it, nor in a graveyard, nor in proximity to a corpse. One is permitted to read it after moving away from the grave of a corpse to a distance of at least four cubits. If the Shema was read in a place where it was improper to do so, it must be read a second time.

Just as the Shema may not be read in a place where there is ordure or urine till he has moved away [to a distance of at least four cubits], so it is forbidden to read the Shema in the presence of any person, even a gentile or child, whose privy parts are exposed, even though a glass partition separates him from them, unless he turns away his face. Since he is able to see, he may not read the Shema, unless he turns away his face. Any part of a woman's body falls under the same rule. Hence, while reading the Shema, one must not gaze at a woman's body, even if she is his wife. And if a hand-breadth of a part of her body [which is usually covered] is exposed, he must not read the Shema while facing it.

Though one's wife is ever lawful to him, it is proper that a disciple of the wise should demean himself with sanctity, and not be like a rooster;⁶Berakot, 22a. G. a Sabbath to Sabbath visitation,⁷Ketubot, 62. C. if there be no physical reason to the contrary, not in the beginning of the night⁸Nedarim, 20; Niddah, 16. C. G. when in a state of satiety, nor at the end of the night when hungry, but about midnight after the food in his bowels be digested, unaccompanied by either exceeding boisterousness or profanity of mouth with vain words, even between themselves. Behold, it is traditionally said that the Verse, "And he declareth unto man what his language is" (Amos. 4.13), the sages interpreted: "Even on account of indecent conversation a man carries on with his own wife, he will have to render an accounting" (Hegigah. 5b). Both of them shall not be intoxicated, nor sluggish, nor in mourning; nor either of them in such state; nor when she be asleep, nor by overpowering her contrary mood; but with the consent and happy mood of both, with few pleasant and light-hearted words to please her being, stilling his urge diffidently and not impudently and dissociate immediately.